Portable battery charger or similar article



FIG. 1 is a top perspective view of a portable battery charger or similar article showing our new design;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a rear elevational view thereof; and

FIG. 4 is a bottom plan view thereof. 

The ornamental design for a portable battery charger or similar article, substantially as shown and described. 